Oil burner



Feb. 9 1926.

R. DOUGHERTY 0 IL BURNER Filed Sept. 2'7, 1922 Patented 1F eh. 9,

UNITEIE STATES PATENT @FFECE.

RICHARD DOTTGI-IERTY, OF PHILADELEI-IIA, PENNSYLVANIA, ASSIGNOR TO: THE

BALDWIN LOCOMOTIVE WORKS, 911" PHILADELPHIA, PENNSYLVANIA, A COR- PORATION OF PENNSYLVANIA.

OIL BURNER.

Application filed September 27, 1922. Serial No. 590,904.

To all whom it may concern:

Be it known that I, RICHARD Donenrn'rr, a citizen of the United States, residing in Philadelphia, Pennsylvania, have invented certain Improvements in Oil Burners, of which the following is a specification.

My invention relates to certain improvements in oil burners, in which the oil is drawn into the burner by the action of air under pressure, the oil being projected in a finely divided spray at the mouth of the burner.

One object of my invention is to design the burner so that a sui'iicient vacuum is produced in the oil line to pull the proper quantity of oil through the long hose from the oil tank to give the desired flame.

A further object of the invention is to provide the burner with a detachable combustion chamber, which permits the burner to be used as a heating torch.

In the accompanying drawings:

Fig. 1 is a side view of my improved burner, showing a combustion burner attached;

Fig. 2 is a longitudinal sectional view drawn to a scale larger than that of Fig. 1;

Fig. 3 is a rear end view of the burner; and

Fig. 4 is a sectional view on the line 44:, Fig. 2.

Referring to the drawings, 1 is the body of the burner having a central air passage 2 reduced at 3 where it extends through the tapered portion 13 at the forward end of the body portion. lVithin the body portion and surrounding the air passage 2 is an annular channel 1 that communicates with an oil passage 5. This passage has an internal thread to which is secured the oil supply pipe 6, which may be a rigid tube, or a rubber hose, if the oil tank is a considerable distance from the burner. An air pipe 7 is screwed onto a threaded extension 8 at the r ar end of the body portion 1. This pipe is connected to any air pressure device. Extending through the annular channel 4. is a series of small channels 9, which surround the air passage 2, as indicated in the drawings. These channels communicate with an oil chamber 10 formed between the end of the body portion 1 and the nozzle section 11. This nozzle section is tapered at 12 on the same line as the projection 13 of the body portion 1. The extension 14; of the nozzle has a passage 15 larger than the reduced portion 3 of the air passage 2 and terminates in a flared portion 16, which is the 19 in which is the combustion chamber 20.-

This hood may be of any shape, depending upon the use for which the burner is intended. In some cases, the hood can be re moved when the burner is to be used as a heating torch. In the body portion is an opening 21, which communicates with the annular channel t for oil. This opening is closed by a plug 22. When the plug is removed, the annular channel t, as well as the longitudinal channels 9, can be thoroughly cleaned. By removing the nozzle section 11 from the body portion, the chamber 10, as well as the openings in the nozzle, can be cleaned.

A burner constructed in accordance with my invention will produce sufficient vacuum, due to the action of the air, to cause the oil to flow through the long rubber hose from the oil tank to the burner, which is usually of considerable length in order to allow the burner to be portable.

In order to regulate the film of oil passing through the burner, the nozzle section is made adjustable on the body portion, the nozzle section being locked in position in the present instance by the jamb nut. A very fine adjustment can be secured as the tapered projection of the body portion extends into a tapered recess in the nozzle section, as shown clearly in Fig. 2.

I claim:

1. The combination in an oil burner, of a body portion having a central air passage terminating in a reduced portion and eX- tending from one end of the body portion to the other, said body portion having a tapered projection at the forward end through which the reduced air passage extends; an annular oil channel surrounding theair passage at the rear end of the burner and connected with an oil supply; a series of longitudinal channels connected'with the annular channel and extending parallel with the air passage; and an adjustable nozzle section mounted on the body portion and having a tapered opening into which extends the projection of the body portion, the nozzle section and the body portion forming an annular chamber for the oil so that, when the air under pressure is admitted to the air passage, it will draw oil through the channels and through the space between the tapered extension of the body portion and the nozzle section.

2. The combination in an oil burner, or" a body portion having. a tapered projection at one end; an air passage extending entirely through the body portion; an annular oil chamber at the rear of the body portion and connected to an oil supply; a series of small channels surrounding the air passage and connected to the annular channel; a nozzle section screwed onto the body portion and having a nozzle, the passage in said nozzle being tapered at the rear to correspond with the taper of the projecting portion of the projection of the body portion; an oil chamber surrounding the projection of the body portion and communicating with the longitudinal channels, the nozzle being adjustable in respect to the body portion; and meansfor locking the nozzle section in the position to which it is adjusted.

3. The combination in an oil burner, of a body portion having a central air passage therein and having a tapered projection at the forward end through which the air passage extends; an annular oil channel in the body portion communicating with an oil supply; small longitudinal channels connnunicating with the annular channel and e?- tending to the outer end of the body portion; a nozzle section adjustably mounted on the body portion; means for locking the nozzle section in the position in which it is adj usted, said nozzle section having a threaded extension; and a hood mounted on the extension and .forming a combustion chamber, the nozzle extension having a passage therein tapered at the rear end to correspond with the taper ot the projection on the body portion so as to form a narrow, annular passage for oil, which surrounds the air passage.

RICHARD DOUGHERTY. 

